import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'

Vue.use(VueRouter)

  const routes = [
  {
    path: '/',
    redirect: '/login'
  },
  {
    path:'/login',
    component: Login
  },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children:[
      {
        path:'/welcome',
        component: Welcome,
      },
      {
        path:'/users',
        component: Users
      }
    ]
  }
]

const router = new VueRouter({
  routes
})

// 路由导航守卫，控制访问控制权限
router.beforeEach((to,from,next) => {
  // to 将要访问的路径
  // from 代表从那个页面跳转过来
  // next 代表放行
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem("token")
  if(!tokenStr) return next("/login")
  next()
})

export default router
